redumper is a low-level byte perfect CD disc dumper. It supports incremental dumps, advanced SCSI/C2 repair, intelligent audio CD offset detection, among other features. redumper is also a general purpose DVD/HD-DVD/Blu-ray disc dumper.

libsoundio is a C library providing audio input and output. The API is suitable for real-time software such as digital audio workstations as well as consumer software such as music players.

The LSP DSP library provides a set of functions that perform SIMD-optimized computing on several hardware architectures. All functions currently operate on IEEE-754 single-precision floating-point numbers.

TiMidity++ is a software synthesizer. It can play MIDI files by converting them into PCM waveform data; give it a MIDI data along with digital instrument data files, then it synthesizes them in real-time, and plays. It can not only play sounds, but also can save the generated waveforms into hard disks as various audio file formats.

Ableton Link is a C++ library that synchronizes musical beat, tempo, and phase across multiple applications running on one or more devices. Applications on devices connected to a local network discover each other automatically and form a musical session in which each participant can perform independently: anyone can start or stop while still staying in time.

QM-DSP is a C++ library of functions for DSP and Music Informatics purposes developed at Queen Mary, University of London.

Audacity is a multi-track audio editor designed for recording, playing and editing digital audio. It features digital effects and spectrum analysis tools.

FluidSynth is a real-time software synthesizer based on the SoundFont 2 specifications. FluidSynth reads and handles MIDI events from the MIDI input device. It is the software analogue of a MIDI synthesizer. FluidSynth can also play midifiles using a Soundfont.

DarkIce is a live audio streamer. It takes audio input from a sound card, encodes it into Ogg Vorbis and/or mp3, and sends the audio stream to one or more IceCast and/or ShoutCast servers.

LibOFA is an audio fingerprint library, created and provided by MusicIP.

LADSPA is a standard that allows software audio processors and effects to be plugged into a wide range of audio synthesis and recording packages.

Fluid-3 is Frank Wen's pro-quality GM soundfont.

midicomp can manipulate SMF (Standard MIDI File) files. It can both read and write SMF files in 0 or format 1 and also read and write its own plain text format. This means a SMF file can be turned into easily parseable text, edited with any text editor or filtered through any script language, and recompiled back into a binary SMF file.

wp-notifyd is a lightweight notification daemon for WirePlumber (the session and policy manager for PipeWire).

RtAudio is a set of C++ classes that provides a common API for real-time audio input/output. It was designed with the following objectives:

• object-oriented C++ design

• simple, common API across all supported platforms

• only one source and one header file for easy inclusion in programming projects

• allow simultaneous multi-api support

• support dynamic connection of devices

• provide extensive audio device parameter control

• allow audio device capability probing

• automatic internal conversion for data format, channel number compensation, (de)interleaving, and byte-swapping

Faust is a programming language for realtime audio signal processing.

This is a free software version of SGI's audiofile library. It provides a uniform programming interface for processing of audio data to and from audio files of many common formats.

Currently supported file formats include AIFF/AIFF-C, WAVE, and NeXT/Sun .snd/.au, BICS, and raw data. Supported compression formats are currently G.711 mu-law and A-law.

This package provides a header-only version of the HIIR library by Laurent De Soras, updated to version 1.40. HIIR is a C++ library for changing the sampling rate of a signal by a factor two, in both directions (upsampling and downsampling), obtaining two signals with a π/2 phase difference (Hilbert transform). It is made of a two-path polyphase IIR filter, implemented with FPU, 3DNow!, SSE, SSE2, AVX, AVX-512 and NEON instruction sets.

This package contains the same as the original library, except with the contents of one source file moved into a header file (and set as inline) to make the library header-only, and with the test folder removed.

Sratom is a library for serialising LV2 atoms to/from RDF, particularly the Turtle syntax.

audio-to-midi converts audio files to multichannel MIDI files. It accomplishes this by performing FFTs on all channels of the audio data at user-specified time steps. It then separates the resulting frequency analysis into equivalence classes which correspond to the twelve tone scale; the volume of each class being the average volume of its constituent frequencies. This data is then formatted to MIDI and written to disk.

This package provides Steve Harris's LADSPA plugins.

siggen is a set of tools for imitating a laboratory signal generator, generating audio signals out of Linux's /dev/dsp audio device. There is support for mono and/or stereo and 8 or 16 bit samples.

libdjinterop is a C++ library that allows access to database formats used to store information about DJ record libraries.

Libmodplug renders mod music files as raw audio data, for playing or conversion. mod, .s3m, .it, .xm, and a number of lesser-known formats are supported. Optional features include high-quality resampling, bass expansion, surround and reverb.